文档介绍：I:首先是关于拱(ARCH),以下是一些关于拱的相关词语,有助于我们更深入详细的了解(here is some keys words for Arch)
(拱顶石) - the central stone of an arch or vault. 位于拱或者拱顶的中央的石头
(拱石) - stones than make the arch (usually brick or wedge-shaped). 用于建造拱顶的石头(多数为砖或者楔形物)
(起拱点,拱墩) - the part of the arch's wall (usually molding) on which the arch rests. 拱落脚的那一段拱墙(通常是线脚)
- the part of the arch's wall which balances the force of gravity the arch makes (thrust) .拱墙上用于平衡拱的重力(一个推力)的部位
- the center point of the
(跨度) - the width of the arch's opening. 拱的宽度
(冠) - the top part of an
(拱角) - the part of the arch's wall which experiences the most thrust. 拱墙承受推力最大的地方
从下面这张图可以看到这些名词所指代的地方,可以对照序号观看:(check the pic below to find the corresponding place.)
 
 
 
在了解了这些基本知识以后,我们就进入下一步:拱的分类
如同在上一PART里说的”歌特式建筑的一个重要特征便是它的pointed arch,, Equilateral 和Ogee.”(as is said in Part 2, the pointed arch is one of the unique feature of Gothic architecture. The mon gothic arches are Lancet, Equilateral and Ogee.)
以下就是各式ARCH的简图,这个作为一个简单的了解即可,不用深究:
这个就是标准的Gothic (Pointed)拱
 
Ogee: The double-curve ogee (oh-jee) was introduced from the Arab world in the 14th century and became popular throughout medi England. It was also a favorite in Venice, Italy from where it derived its other moniker - the ian arch. It can also be referred to as a keel arch for its apparent resemblance to ship :双曲线Ogee是十四世纪从阿拉伯引入的,,它也十分受欢迎,并在那里获得了一个别名:,它也可以被称作龙骨拱.
 
 
Round圆拱
 
Segmental弓形拱
 
Tudor
 
 
 
 
 
II:拱肋(RIBS)
哥特式教堂的结构体系由石头的拱肋(RIBS)和飞扶壁(FLYING BUTTRESS)组成的,我们先从拱肋认识起.
 
拱肋的构造一般来说其基本单元是在一个正方形或矩形平面四角的柱子上做双圆心骨架尖券,四边和对角线上各一道,屋面石板架在券上,形成拱顶。采用这种方式,可以在不同跨度上作出矢高相同的券,拱顶重量轻,交线分明,减少了券脚的推力,简化了施工。
拱肋所承受的穹顶压力在矩形的各个角上被内部的细圆柱承受。侧向推力被外面看得见的斜向拱垛承受,它们又把压力传到扶垛支墩上。这样,整个穹顶的力都集中在拱角上,墙壁减轻了负荷,从而可以在整个拱的宽度上用窗户来代替墙.
既然说到拱肋,就不能不说与之相关的拱顶(Vault):以下是几种常见的拱顶以及简单的说明,这有助于我们理解拱